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Malte UblandClaude Opus 5.5
7176257136
fs.watchFile(path[, options], listener) polls the resolved path every `interval` milliseconds (5007 by default, `persistent` by default) and calls its listener with (current, previous) Stats when a poll sees a difference. The first poll only records the baseline, a path that cannot be stat'd polls as all-zero Stats, and a stat failure that repeats for the same errno is not re-reported. One poller per RESOLVED path is shared by every listener on it, and fs.unwatchFile(path[, listener]) removes the last listener registered with that callback, or every listener when called without one. The call is a statement, since Node's StatWatcher has no lowering, and bigint: true is refused. The implementation is scr_watch_file.c, a new gated runtime unit switched by moduleUsesFsWatchFile, so programs that do not poll link none of it. The feature travels the usual chain (runtime-features, executable-features, the native link info, the executable cache keys, the runtime-pack matrix) and the validator learns that fs.unwatchFile's trailing listener slot may be omitted. Evidence: - tests/corpus/fs-watch-file-names.ts and fs-watch-file-polling.ts match Node on stdout, stderr and exit status in the plain and sanitized lanes - 1564-fs-watch.ts, 1751-options-record-stance.ts and the `fs` corpus stay green; the new order baselines and corpus cost files are recorded Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>